Blood Purification for the Treatment of Pathogen Associated Shock

Patients meeting the eligibility criteria will be randomized to receive either treatment with the investigational device (Seraph 100) + 'State of the Art' care versus 'State of the Art' care alone. This study is a multi-center, un-blinded, randomized controlled feasibility trial to evaluate the initial safety and efficacy of Seraph 100 in critically ill patients with pathogen associated shock across 15 US sites. This study will not be done in a blinded fashion from either the patient or caregiver perspective given: 1) the need for invasive, central line placement, and 2) to ensure that limited hospital resources (e.g., hemodialysis machines) are available for patients that require therapy. While the study trial will not be conducted in a blinded fashion, the members of the study team that do the data analysis will be blinded.

The target population is adults (18 years old and older) admitted to the ICU with all of the following:

* Pathogen associated shock AND * The need for vasopressors at any dose to maintain mean arterial pressure (MAP) ≥ 65 mm Hg despite adequate fluid resuscitation.

Study Arms: Patients will be randomized to receive either Arm 1: Seraph 100 treatment plus 'State of the Art' or Arm 2: 'State of the Art' care alone. "State of the Art care" will be defined as the treatment algorithms outlined in the Surviving Sepsis Campaign for the treatment of septic shock, available at https://www.sccm.org/SurvivingSepsisCampaign/Home.

Study Randomization and stratification: Patients who qualify will be immediately randomized. The study will randomize patients 2:1 to investigational product plus 'State of the Art' care and 'State of the Art' alone, respectively. Upon randomization, patients will be stratified by age (≥65 and \<65). While ideally, the research team would stratify by other variables (to include demographics, causative pathogen, GCS, SOFA, associated organ failure, and pre-existing conditions), given the small number of patients in this trial (particularly in the control group) this is not possible.

The Seraph 100 Microbind® Affinity Blood Filter (Seraph 100) manufactured by ExThera Medical Corporation in Martinez, CA.

Investigational Treatment Duration for Seraph 100: A sufficient blood flow rate and exposure of the patient's blood to the Seraph 100 adsorption media will optimize the treatment success with a target total filtered blood volume of 100L per day. Based on the target total filtered blood volume of 100L, the average treatment duration and blood flow rates are captured below: